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- W2358542011 abstract "Calcareous nannofossils in CM1D03Co-rich crust of west Pacific Seamounts were analyzed to esimate the stratigraphic ages.The results showed that the lower layer was formed in the late Paleocene-early Eocene(54~51Ma),whereas the porous middle layer was formed in the middle Eocene(45~40Ma)and the upper layer was in the Miocene-Pliocene(22~2.4Ma)and the Pliocene-Pleistocene(3.6~1.2Ma). The molecular fossils,including chloroform bitumenA,n-alkanes,isoprenoids,steranes,in the Co-rich crust were measured using gas chromatography and gas chromatography-mass spectrum.The source composition,depositional environment and palaeoecological community succession in the Co-rich crust during its growth have been discussed by analyzing the characteristics of these fine molecules(C27,C28,and C29 steranes)and their molecular indices(ΣC-23/ΣC+ 24,CPI and Pr/Ph)with consideration of the variation in organic carbon(TOC)content and its stable isotope compositions(δ13C)records.The results showed that chloroform bitumenA/TOC(A/C)ratio was 10.51%~21.74%,showing significant hydrocarbon transport pattern.The ratio ofΣC-23/ΣC+ 24for n-alkanes was 0.74~1.47,the CPI was 0.80~1.45,and the value ofδ13C was-24.00‰~-25.48‰,indicating that organic matter in the Co-rich crust mainly origined from phytoplankton.The results also indicated that the source of organic matter,C27,C28,and C29 steranes distribution variation,TOC preservation andδ13C were related to changes in marine environment, global climate and Antarctic Bottom Water during the formation of Co-rich crust." @default.
- W2358542011 created "2016-06-24" @default.
- W2358542011 creator A5083326446 @default.
- W2358542011 date "2014-01-01" @default.
- W2358542011 modified "2023-09-25" @default.
- W2358542011 title "MOLECULAR FOSSIL AND NANNOFOSSIL RECORDS IN A Co-RICH CRUST OF WEST PACIFIC SEAMOUNTS:IMPLICATION FOR STRATIGRAPHIC DIVISION AND PALEOECOLOGY AND PALEOENVIRONMENT" @default.
- W2358542011 hasPublicationYear "2014" @default.
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